Rock Creek
Key Takeaway
Rock Creek is classified as high hazard in California. It was completed in 1950 and is 76 years old. Its primary use is hydroelectric. High hazard means loss of life is likely if the dam fails — it does not indicate the dam's current condition. Learn more.
Physical Details
| Dam Height | 126 ft (taller than 86.9% in CA) |
| Dam Length | 567 ft |
| Dam Type | Concrete |
| Max Storage | 4.4K acre-ft |
| Normal Storage | 1.6K acre-ft |
| Surface Area | 114 acres |
| Drainage Area | 1,771 sq mi |
| Max Discharge | 280,000 cfs |
| Year Completed | 1950 (76 years old) |
| NID ID | CA00330 |
Safety Information
Loss of human life is likely if the dam fails.
Hazard potential describes downstream consequences of failure, not the dam's current condition. What does this mean?
Ownership
Pacific Gas and Electric Company
Private
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High Hazard 70 ftFrequently Asked Questions
What is the hazard classification of Rock Creek?
Rock Creek is classified as High Hazard. Loss of human life is likely if the dam fails. This classification refers to the potential downstream consequences of a failure, not the dam's current structural condition.
Who owns and operates Rock Creek?
Rock Creek is owned by Pacific Gas and Electric Company (Private). The owner is responsible for maintenance, inspections, and compliance with dam safety regulations.
When was Rock Creek built?
Rock Creek was completed in 1950, making it 76 years old. Many U.S. dams were built between the 1930s and 1970s during a period of major infrastructure investment.
What is the primary purpose of Rock Creek?
Rock Creek serves the following purposes: Hydroelectric. Many dams in the U.S. are multi-purpose, supporting flood control, water supply, recreation, and other uses.
How tall is Rock Creek?
Rock Creek has a dam height of 126 ft. Dam height is measured from the natural streambed at the downstream toe to the top of the dam, and may differ from the visible height.
When was Rock Creek last inspected?
Rock Creek was last inspected on September 14, 2022. Inspection dates indicate when a formal review occurred, not the results of that inspection.